Currently on the coinmarketcap site only about 1590 projects compared to at times more than 1700 projects. They have left many projects without developers or scam projects. I personally invested in some of these projects and lost a lot of money like bitconect and centra. Do you trust the projects you are investing in and will keep them for a long time until they succeed or are they just looking for profit in the short term?
The bear season has revealed the true nature and value of many projects and their devs. Most greedy devs would have done exit scam or claim to be hacked so as to run with investors funds. Long term holding of any coin is risky.